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Finding the Fourth Proportional to 117,627.20, 176,440.80 and 65,139.20

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Solution

The fourth proportional to 117,627.20, 176,440.80 and 65,139.20 is: 97,708.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,627.20 : 176,440.80 = 65,139.20 : x
  2. Step 2: Convert to fraction form
    117,627.20/176,440.80 = 65,139.20/x
  3. Step 3: Cross multiply
    117,627.20x = 176,440.80 × 65,139.20
  4. Step 4: Simplify right side
    117,627.20x = 11,493,212,559.36
  5. Step 5: Solve for x
    x = 11,493,212,559.36/117,627.20
  6. Step 6: Final answer
    x = 97,708.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.